Quick-acting pump coupling



Dec. 9 1924.,

H.P.KRAFT QUICK ACTING PUMP COUPLING Filed May 20, 1921 Patented Dee. 9 i924..

esima HENRY PHILLIP KRAFT, OF RIDGEWOOD, NEW JERSEY; EDGAR J PHILLES JNID i u EXEGUTORS 0F HENRY P. KRAFT, DEGEASED.

QUICK-ACTING PUMP COUPLING.

Application led May 20, 1921.

To ad whom t any cof/wem.'

Be it known that l, HENRY PHILLIP Kimm, a citizen of the United States of America, residing in Ridgewood, in the county of Bergen and State of New Jersey, have invented certain new and useful lmprovenients in a Quick-Acting Pump Coupling, of which the following is a specifica- UOD. v

'the present invention relates to pump couplings, and aims to provide certain improvements therein.

'lhe present invention is particularly directed to that type of pump coupling, whereby a quick attachment and detachment of said coupling with a tire valve or the like, may be readily made, and one wherein notwithstanding its comparatively simple construction provides a very secure union between the coupled parts.

According to the present invention 1 provide a coupling member having an enlarged end adapted to fit over a valve nipple or other threaded member. A section of this end is preferably cut away to admit a 'dog or catch member adapted to be projected into the bore of the coupling. This dog or catch member is preferably formed with screw threads adapted to engage the threads on the member to which it is to be coupled. .according to one embodiment of the invention the dog is carried by a split rin'g and manipulated `by a linger piece associated with said ,split ring through a oamming action. But according to the preferred embodiments of the invention as herein disclosed the dog or catch member is carried directly by the body of the coupling and is operated `by a manipulating part provided with a cam face, carried by a pair of ears or lugs on the body of the coupling.. In the various embodiments of the invention, the same broad inventive idea is disclosed, which briefly stated is, that of causing-an engagement between a threaded clog or catch member carried by a coupling with a valve nipple or the like through the simple tilting or moving of a linger-piece which carries a camming face..

The invention also includes other features of improvement, which will be hereinafter more fully set forth.

Referring to the drawings which show several embodiments of the invention:

Figure l is a longitudinal section showing Serial No. 471,274.

the coupling in engagement with a valve nipple.

Fig. 2 is a longitudinal section partly in elevation of the coupling showing the dog in its disengaging or retracted position.

Fig. 3 is a view similar to Fig. l showing another form of the invention.

Fig. Ll is a section taken substantially on the line -ei of Fig. l.

Fig. 5 is a section taken substantially on the line 5-5 of Fig. 3.

Figs. 6 and 7 are longitudinal sections showing the preferred embodiments of my invention.

Figs. 8 and 9 are sections of Figs. 6 and 7 respectively taken on the lines 8--8 and Referring first to Figs. l, 2 and d of the drawings let A indicate the coupling which consists of a body portion B and the usual ridged shank G for engagement with a rubber hose. The body portion is preferabl enlarged and formed with a bore l) Whici is adapted to pass over the end of a valve nipple7 the wall of the bore D being preferably unthreaded so as to slip easily over said valve nipple. preferably recessed as shown` at E, t0 receive a dog or catch member F, said dog being provided with screw threads at its inner end and adapted to be moved into the bore D to engage the valve nipple and to be retracted therefrom to disengage said nipple. rlhe dog in cross section is of the same contiguration as the recess F, which acts to guide said dog in its inward andl outward movement and thus maintain the threaded end thereof in its properali'gnment with respect to the valve nipple. For supporting and providing an operative connection between the dog l" and a manipulating finger piece G, there is provided a split ring member H, positioned in an annular groove l formed on the body of the coupling member B. rlhis ring l is preferably loosely mounted in said groove I to lie substantially flush with the outer surface of the body portion and has its ends formed with odset ears h, between which is mounted the finger piece Ur. At a point substantially diametrically opposite the linger piece, the dog F is connected to the ring H in any approved manner and herein shown as riveted thereto. The finger piece Gr is mounted on a pivot pin passing through the ears /1 and is designed The body portion B is.

when the coupling is applied thereto.

to be tilted or rotated in a longitudinal direction with respect to the coupling. The finger piece Gr is formed with a cam face g adapted to' coact with the wall of the groove I adjacent thereto to shift the ring H bodily with respect to said groove and with a finger manipulating part herein shown as a quadrant of a circle having its edge milled. It is to be understood, however, that the finger piece may take any desired form. The bodily shifting'of the ring, results in the movement of the dog into and out o1 the bore D.

In order to provide a leaktight seal between the coupling and the valve nipple the bore D in the body Bislpreferably provided with a flexible gasket adapted to make contact with the end of the valve nipple shown this gasket is in the nature of a plunger adapted to move longitudinally in the bore D. To ensure the formation of a leak-tight joint between' the coupled" members, the longitudinal movement of the gasket is promoted by forming the inner end of the bore in the shank C with a flaring open end c, so as to expose a large surface area of the gasket K to the incoming infiating pressure. The result of this construction is that. lthe incoming pressure will act upon the top of the plunger gasket to move it into contact with the end of the valve nip,-

Aple to form a seal therewith.

In the embodiment of the invention shown in Fig. 3, I do away with the split supporting ring H, and mount the dog and manipulating finger piece directly onthe body member'B. This, I accomplish by forming the body -B with a pair of integral ears b, one on each side ot recess E which' carries the dog F. closed is formed with a bifurcated shank f, the prongs `of which are formed with coinciding elongated openings f', through which passes a guide pin f2. This guide pin also passes throu h the ears b and through the finger iece for which it acts as a ivot. As in igs. 1 and 2, the finger piece nr positioned between the bifurcation on the dog and the ears on the body member is formed witha cam face g which acts to move the dog into and out of the bore- D. In the present construction this ca'm face acts directly against the head or bite ofthe bifurcation on the dog member.

.In the preferred embodiments of? my invention as disclosed in Figs. 6 and 7 the construction is'similar in many respects to that shown in Fig. 3, and hereinbefore described, the outstanding features being thatI the dog is not fixedly connected to the manipulating finger piece and that an' irnproved *orm of packing gasket is employed. As herein shown the dog F2 is formed with The dog as herein dis G2, which when .tilted downwardly urges the dog inwardlythrough the action of said cam face. The finger piece G2 is pivotally mounted between a pair of' ears M formed either integrally with or carriedby the body portion and as in the previously described modifications is preferably formed vas la quadrant of a circlewith its outer edge milled or roughened in any al'ipropriate manner. In Fig. 6 wherein the ears M are shown as formed integral with the body portion, the body portion may be made by either a series of drawing operations from 'metal of appropriate cross sectional configuration or by casting from a suitablel pattern. In Fig` 7,\ the ears or lugs M are formed on a separate sleeve member N which is fitted over a part of the body por tion of thecoupling to lie Hush with the upper portion thereof and is secured thereto in any approved manner. This sleeve member N may bein the form of a casting or may be made by stamping from suitable sheet metal. Asshown in Figs. 7 and 9, thelower part 'of the body portion is formed with a rib or projection 0, which serves to guide and posltion the sleeve N on the body portion prior to its permanent `fastening thereto, but it is evident that this rib may be done away with without departing from the inventive thought disclosed.

The improved packing gasket K disclosed in Figs. 6 and 7 is similar in many respects to that shown in Figs. 1 and 2, in that it consists of aeexible gasket in the nature of a plunger adapted to move longitudinally of the bore. To promote this longitudinal movement, the inner end of the coupling shank is flared outwardly as shown at c and thel ask'et K formed with a tapered bore la', t e flared end of said bore facing the flared opening in the shank. It will thus be seen that fluid ypressure entering the shank will have a greater longitudinal component acting directly against the plunger asket than heretofore provided, due to t e increased gasket surface ex osed to such presf seal between the coupled members will ther lfore result; from said construction.

In operation, to apply the device the fin er piece is positioned so that the dog lies eit er in its retracted position fiush with the bore D as shown in Fig. 2 or so that it may be readily moved into said position upon contacting with the valve nipple. In this position 'the coupling is slipped over the valve nipple and the finger piece is with other parts,

tilted or rotated downwardlyto bring the threaded dog into 4engagementy with the nipple as shown in Figs. 1 and 3. A very secure connection is thus provided. When ,it is desired to remove the coupling a tiltingl or rotation of the 'finger piece upwardly and to pump couplings, it is obvious that the in ventive thought lnvolved may beapplied to other devices such las dust caps, rim-nuts or other devices which it is sought to couple yand I, therefore, do not wish to be limited to the` particular constructions illustrated, as various modifications may be resorted to without departing from the spirit of the invention.

instead of having the bore of thecou ling Unthreaded and the engaging face o the dog threaded, this arrangement may be re versed or both the bore of the coupling and For example,

the en a'gin face of the dog may be threaded as e/sired.

What l claim is 1. A pump coupling or the. like, having a movable dog adapted to engage a threaded member to hold the coupling thereon,oand

va rotative member /formed with a cam face adapted to engage and move said dog into engagement-'with the threaded member, said 'rotatlve member being movable about an axis arranged at right 'angles to the longitudinalaxis of the pump coupling( recessed body portion, a pair of ears on said body portion adjacent said recess, a dog movable in said recess an between said ears and adapted to engage a part to hold the couplingithereon and a manipulating member pivoted to said ears and adapted to move said dog into engagement with said part.

In witness whereof, I` have .hereunto signed my name. v

HENRY PHILLIP KRAFT.

- 35 2. A pump coupling or the like having a 

